1. WP11.5.3 High Beta Cavities Delivery
5th SRF Collaboration Meeting
9th February 2017
In collaboration with:

2. Major activities / phases
Niobium procurement: tender live
Cavity procurement: writing tender (schedule critical)
Infrastructure construction: design & build ongoing
RF, Cryo, Cryoplant, Shielding
Civil works: delays, within float
Quality planning: need to collaborate on details
Infrastructure qualification
schedule in place
plan to be detailed further
Risks: cost (exchange rate) & schedule

3. Hβ Cavity Scope / Tech. Annex
Technical Annex
Baseline agreed (v1.1) but still pending cover sheet [legal depts STFC & ESS]
STFC In-Kind Contribution:
Niobium procurement
Manage Eddy Current Scanning with DESY
Validation of treatment processes (esp. BCP) in industry using ‘pre-series’ cavities
Cavity fabrication of 84+4 high beta cavities in industry
2K RF qualification of cavities to 22.9MV/m, Q0 ≥ 5 x 109
Supply documentation & certification related to each cavity test
Procurement of ancillaries, valves, antennae etc
Transport to Saclay
Outside STFC Scope
Cavity design (STFC strategy: primarily ‘build-to-print’)
Prototyping & trial cavities (CEA)

4. Project Schedule & Key MilestonesMS
Description
TA Date
Forecast 4
Design and procurement of the VTF started
09/2016
04/2016 5
Installation and commissioning of the full VTF system (start)
S: 07/2017
F: 06/2018 8
Critical Design Review, reporting, stage 2 starts after approved CDR
Q4 2017
TBD 9
Receiving and arrival inspection of first batch Nb material
08/2017 12
FAT at STFC and shipping of high-β cavities for CM 1 to CEA
11/2018
12/2018 18
FAT at STFC and shipping of high-β cavities for CM 2-3 to CEA
01/2019
03/2019 19
FAT at STFC and shipping of high-β cavities for CM 4-6 to CEA
05/2019 20
FAT at STFC and shipping of high-β cavities for CM 7-9 to CEA
07/2019
09/2019 21
FAT at STFC and shipping of high-β cavities for CM to CEA
11/2019
12/2019 22
FAT at STFC and shipping of high-β cavities for CM to CEA
03/2020 23
FAT at STFC and shipping of high-β cavities for CM to CEA
06/2020 24
FAT at STFC and shipping of high-β cavities for CM to CEA
10/2020 28
Preparation of the data package for SAR 2
(cavities to CM 2-21 after assembly) and SAT at ESS in Lund
Q1 2021
Change agreed
Include:
Preseries
BCP validation
Undressed testing
Impact:
Up to 6 wks on specific deliveries

5. Cavity Fabrication Procurement
Pre-series change request
Risks & Issues
Much less schedule impact than 1st thought
Schedule
Series half-cell fabrication in parallel
Need to align beween:
Testing undressed at DESY / CEA tbd
Uppsala test
CEA prototypes
Cavity procurement specification
Pre-series undressed tests
Design drawings in progress
Series production & CEA cavity production
Strategy:
Drawing sign-off
Tender: Representative processes, QA etc
Company input & improvement
Need to quickly obtain approval for design drawings
Review with STFC, ESS, CEA(?)
Finalise on placing contract
Examples of cavity definitions:
Treatment specifications
BCP treatment processes final specification
Need to collaborate with ESS, CEA to optimise strategy
Input RF antenna specification
CMM measurement locations
Flexibility in procurement
How to collectively finalise procesess
Expectation: ESS approve final detailed specifications
Required when placing contract
Expected June / July 2017

6. Cavity Procurement Schedule
Key considerations:
Rapid procurement launch – too early?
Processes to agree final cavity specifications?
Schedule alignment with other testing
ESS, Uppsala
CEA Saclay prototypes
INFN prototypes / series
Schedule DESY
VERY LIMITED FLOAT!

7. Technical Progress: Cavities
4th SRF Collab. Mtg:
Updated drawings required from ESS
5th SRF collab. Mtg:
STFC updating drawings (CAD received 3/02/2017)
ESS / CEA to review & approve (retain design responsibility)
Helium outlet pipe
430mm radius from cavity beam axis
Standard welded flange
Compatible w/ CEA pipe cutter
Tooling to be agreed between STFC & CEA

8. Technical Progress: VTF, RF & bunker
Minor delays but no impact to critical path
Cryostat final design review passed 07/09/2017
Magnetic shield design progressing
Cryogenic plant
Compressor & oil removal system arrived
2nd delivery due end Feb (on schedule)
Bunker
Delayed due to change of civil construction contract
Work started & cost estimate overbudget; need to reduce cost (pre-cast solution?) RF
System design progressing
Expect final rack pre-assembly design review late March
Procurement of test cavity (Nb coaxial resonator) progressing in parallel
QA/QC
Need to accelerate

9. Technical Progress: Cleanroom & HPR
HPR System
TENDER LIVE
Thanks to CEA for support in defining system
Lowest risk to delivery schedule to base on existing design as much as possible
Single source main HPR if possible
UPW system: 30Lpm, 100bar, 18.2MΩ
Cleanroom
ISO7: Inspection room; outer changing room
ISO5: Changing area
ISO4: Working area, HPR room, prep room
Services, pass-through bulkheads etc all defined
Requirements reviewed externally (DESY)
Procurement delayed but launching shortly

10. Quality Assurance To be discussed this afternoon (MDP)
Need to work collectively to define:
Document storage systems
Alfresco costs are too high for HBC project budget
Reviewing if other UK-ESS projects could share costs
Facility validation plan (high level schedule above)
Cavity references
Test reproducibility
Shipping, handling & processing validation
Reports & data parameters / criteria
Cavity material & fabrication data requirements
SRF test data